From:	CSBVAX::MRGATE!info-vax-RELAY@KL.SRI.COM@SMTP  9-JUL-1988 19:11
To:	ARISIA::EVERHART
Subj:	DUNGEON GDT


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Date: Sat, 25 Jun 88 10:39:21 PST
From: Peter Scott <PJS@naif.JPL.NASA.GOV>
Subject: DUNGEON GDT
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erd@tut.cis.ohio-state.edu asks:

>How do you access GDT (dungeon editor) in DUNGEON?

>I was in the process of playing DUNGEON on the VAX at work, and stumbled
>across some interesting text in the executable: the dungeon editor and
>debugger GDT.  When you type GDT at the > prompt, the game asks you to
>qualify yourself.  It gives you a six letter word, consisting of random
>characters, and asks for a response.  I only tried rot13, rot10, rot1 and
>rot 25, before giving up.  How do you enter GDT?  (I am playing on the
>version which DECUS released 3-NOV-78 (2.2, I think; with puzzle room and
>endgame)

>Thanks,
>-ethan

I have not succeeded in figuring out the password algorithm.  So I did
the only other logical thing, and patched the image so any password would
do:

PATCH  Version 3-00  15-Mar-1982

%PATCH-I-NOGBL, some or all global symbols not accessible
PATCH>set modu/all
PATCH>set scope gdt
PATCH>dep/ins gdt+17
NEW>  'NOP'
NEW>  'NOP'
NEW>  exit
old:	GDT\GDT+17:  BEQL    GDT\GDT+1C
new:	GDT\GDT+17:  NOP     
new:	GDT\GDT+18:  NOP     
PATCH>update
PATCH>exit

However, note that while GDT can be useful for some things (like making
it impossible to be killed), and you can inspect just about anything you
want to, it is of no use in figuring out the *really* interesting stuff.
For instance, I am still at a loss as to how to open the crypt in the
Land of the Living Dead, or open the jewelled egg without breaking it.
Haven't played it in years now.

Peter Scott (pjs%grouch@jpl-mil.jpl.nasa.gov)